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G. C. GROTH May 28, 1935.

SCROLL Filed Jan. 18, 1954 2. Sheets-Sheet 2 "g a 6%. 01 Grazia Patented May 28, 1935 SCROLL' Gustav C. Groth, Waterto'wn, Wis.

Application January 18,

u 2 Claims.

This invention aims to providenovel means whereby exercises usedin connection "with teaching may be preserved and be made accessible at any time for use. v

It is within the province of the disclosure to improve genera-llyand to enhance the utility of devices of that type to which the invention appertains. I 1 With the above and other objects in. view, which will appear asthe description proceeds, the invention resides'inthe combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made Within the scope of what is claimed, without departing fromthe spirit of the invention. I

In the accompanying drawings! V Fig. 1 shows in front elevation, a device constructed'in accordance with the invention, the doors being opened;

Fig. 2 is a rear elevation wherein the entire middle portion of the device as an entirety is represented as having been broken out;

Fig. 3 is an end elevation;

Fig. 4 is a vertical section on the line 4-4 of of Fig. 2;

Fig. '5 is a fragmental vertical section showing the pawl and ratchet mechanisms;

Fig. 6 is an elevation showing one of the pawl and ratchet mechanisms;

Fig; 7 is a fragmentary sectional View showing the connecting means between the fly sheet and the record strips.

' side, one part of one of the doors may be equipped with a chart 4 for use in teaching music. The chart 4 may be of any desired kind, and there may be as many of these charts as the area of the doors will permit. To facilitate the drawing of lines on the record strips 26 (hereinafter described), the cabinet I is provided at its ends and at its forward side with vertical scales 5, shown in Fig. 1.

Cleats I connect a vertical backing plate 6 the cabinet I.

shown in Fig. 7.

1934, Serial No. 707,168" (c1. 35-9) with the ends 20 and ll of the cabinet I. An" idle roll 8 is journaledon the ends 20 and 2| of the cabinet I and is located above the backing plate 6, as shown in Fig. 4. On the end 2| of 5 the cabinetl there is a vertical bearing 9 having upwardly extended slots I8 shown in Fig. 14.

One end of a receiving roll I is journaled in the bearing 9 and in the end 20 of the-cabinet I. Adjacent to the end 20 of the cabinet I, the shaft II, which carries the receiving roll II], is provided with a ratchet wheel I I adapted to'be engaged by a pawl I2, pivoted to theend 20 of the cabinet I. Second rolls I areprovided, and are arranged in a vertical plane, behind the backing plate 6. The second rolls I5 are carried by shafts I6. The shafts I6 are journaled in the end of the cabinet, and in the slots I8 'of the: bearing 9. Anyone of the shafts I6, therefore, may be removed at will. Pawl and ratchet mechanisms I'I, oflthe kind hereinbefore described, control the rotation of theshafts I6 and the second rolls I5; An operating device I9 such'asa crank, is provided. The crank is assembled detachably with the exposed ends of any of the shafts I6 or II, by threading or otherwise.

Second idle rolls 22 are located in a vertical plane beneath the backing plate 6, as shown in Fig. 4. The idle rolls 22 have their ends journaled in bearings on the ends 20 and 2| of A flexible fly sheet 23 is wound about the receiving roll ID. The sheet 23 passes upwardly, and then downwardly, about the idle roll 8, the free end of the sheet 23 being disposed in front of the backing plate 6. On the lower edge of the sheet 23 there is a binder 24, The binder 24 carries one member 25 of a detachable connection, which may be a snap fastener. Flexible record strips 26 are wound about the second rolls I5. The record strips 26 extend downwardly and then upwardly, about the respective second idle rolls 22, the ends of the record strips 26 being disposed in front of the backing plate 6. On their upper edges, the record strips 26 have binders 21, shown in Fig. 7. The binders carry members 28 of separable connections, such as snap fasteners. The parts 28 of the record strips 26 are adapted to be connected, one at the time, with the fasteners 25 of the sheet 23. Detachable handles 29 are provided, and are adapted to be connected with the rear ends of the detachable connections 28 on the record strips 26. Snap fasteners preferably are used for the mounting of the handles 29.

In practical operation, the handles 29 are assembled with the fasteners 28 of the record strips 26, as shown in Fig. 1. Figure 4 shows that the handles 29 on the record strips 26 are thick enough so that they cannot pass between the lower or second idle rolls 22. The end of each record strip, therefore, is available at all times. The operator pulls out the lower end of the record strip 26 by means of the corresponding handle 29. The handle 29 is removed from the fastener 28 of the record strip 26. The fasteners'28 of the record strip 26 then are connected to the fasteners of the sheet 23. If.

the crank i9 is assembled with the shaft ll of the receiving roll II), the sheet 23 may be reeled on the roll ill, the corresponding record strip 26 being raised in front of the backing plate 6, as shown in Fig. 1. The exercise then-may be written on the exposed part of the record strip 26. The operator can shift the crank IE to the shaft {6 of the roll l5 that carries the record strip 26 which has been used, and the record strip may be wound up again on the corresponding rolll5. Another record strip 26 may be operated in the same way. Examples or exercises infour or more subjects thus may be made available. The exercises or examples are preserved for review or for other purposes, because they are on the record strips 25, which, when not in use, are wound on the rolls l5. All of the sheet 23, and as much of any record strip 26 as is desired may be wound about the roll l0 so as'to expose any of the exercises or examples which have been inscribed on the exposed portion of the record strip 26.

" The device is simple in construction, but it affords a means whereby exercises previously used may be made availablegthe construction having obvious advantages over the practice of chalking an exercise on a blackboard, erasing the exercise, and then writing it over, in the event of review. The device, moreover, affords a means whereby classes in different subjects may be taught successively.

Having thus described the invention, what is claimed is:

1. In a device for preserving and filing school exercises and the like, a'support, a backing plate carried by the support, a plurality of idlers on the support at the lower end of the backing plate, a first receiving roll journaled on the support to the rear of the backing plate, second receiving rolls journaled on the support to the rear of the backing plate, means for rotating'any one of the receiving rolls, a sheet wound about the first receiving roll and extended upwardly, and then downwardly in front of the backing plate, record strips wound about the second receiving rolls, the record strips extending about the idlers, and

means,for connecting the exposed end of any record strip detachably with the exposed end of the sheet.

' 2. In a device for preserving and filing school exercises and the like, a support, a backing plate carried by the support, a plurality of idlers on the support at the lower end of the backing plate, a first receiving roll journaled on the support to the rear of the backing plate, second receiving rolls journaled onthe support to the rear of the backing plate, means for rotating any one of the receiving rolls, a sheet Wound about the first receiving roll and extended upwardly, and then downwardly in front of the backing plate, record strips wound about the second receiving rolls, separable fastener parts joining the exposed end of any record strip with the exposed end of the sheet, and a handle detachably assembled with the fastener parts of any record strip and removable to enable the end of any record strip to be detachably assembled with the exposed end of the sheet, by means of the fastener parts of said record strip and of the sheet, the handles being of such thickness that they cannot pass backwardly between the idlers. GUSTAV C. GROTEL 

